[外语类试卷]专业英语八级模拟试卷506及答案与解析.doc
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1、专业英语八级模拟试卷 506及答案与解析 SECTION A MINI-LECTURE Directions: In this section you sill hear a mini-lecture. You will hear the lecture ONCE ONLY. While listening, take notes on the important points. Your notes will not be marked, but you will need them to complete a gap-filling task after the mini-lecture.
2、 When the lecture is over, you will be given two minutes to check your notes, and another ten minutes to complete the gap-filling task on ANSWER SHEET ONE. Use the blank sheet for note-taking. 0 The Problems Learners of English Face The problems learners of English face can be divided into three bro
3、ad categories: a)【 1】 problems, some of which involve fear of !he unknown, and some of which are caused by the possible homesickness of the overseas student. b)culture problems, which are bound up with the British way of life, including【 2】 , habits and traditions. c)【 3】 problems, for which there a
4、re a number of reasons: First, it seems to overseas students that English people speak very【 4】 . Second, they speak with a variety of【 5】 . Third, different styles of speech are used. What can a student do to overcome these difficulties? He should attend【 6】 and use a language laboratory as much as
5、 possible. He should also listen to programmes in English on the radio and TV. Most important of all, he should take every opportunity to speak with【 7】 . Finally. I have some advice for students who have difficulty in speaking English fluently. Firstly, he must【 8】 what he wants to say. Secondly, h
6、e must try to【 9】 in English. This will only begin to take place when his use of English becomes【 10】 . 1 【 1】 2 【 2】 3 【 3】 4 【 4】 5 【 5】 6 【 6】 7 【 7】 8 【 8】 9 【 9】 10 【 10】 SECTION B INTERVIEW Directions: In this section you will hear everything ONCE ONLY. Listen carefully and then answer the que
7、stions that follow. Questions 1 to 5 are based on an interview. At the end of the interview you will be given 10 seconds to answer each of the following five questions. Now listen to the interview. 11 Employees in the US are paid for their time. This means that they are supposed to _. ( A) work hard
8、 while their boss is around ( B) come to work when there is work required to be done ( C) work with initiative and willingness ( D) work through their lunch break 12 One of the advantages of flexible working hours is that_. ( A) pressure from work can be reduced ( B) working women can have more time
9、 at home ( C) traffic and commuting problems can not be solved ( D) personal relationships in offices can be improved 13 On the issue of working contracts in the US, which statement is NOT correct? ( A) Performance at work matters more than anything else. ( B) There are laws protecting employees wor
10、king rights. ( C) Good reasons must be provided in order to fire workers. ( D) Working contracts in the US are mostly short-term ones. 14 We can assume from the interview that an informal atmosphere might be found in_. ( A) small firms ( B) major banks ( C) big corporations ( D) law offices 15 The i
11、nterview is mainly about_in the USA. ( A) office hierarchies ( B) office conditions ( C) office roles ( D) office life SECTION C NEWS BROADCAST Directions: In this section you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. At the end of each news item, yo
12、u will be given 10 seconds to answer the questions. 16 According to the news, who claimed responsibility for the rocket attack? ( A) A 36-year-old Israeli man. ( B) Palestinian militants. ( C) Israels offensive. ( D) Hamas 17 50 Palestinians or so have been killed in the raids which began _ ago. ( A
13、) 12 weeks ( B) 12 days ( C) 2 weeks ( D) 2 days 17 The need for solar electricity is clear. It is safe, ecologically sound, efficient, continuously available, and it has no moving parts. The basic problem with the use of solar photo-voltaic devices is economic, but until recently very little progre
14、ss has been made toward the development of low-cost photo-voltaic devices. The larger part of the research funding has been devoted to study of single-crystal silicon solar cells, despite the evidence, including that of the leading manufacturers of crystalline silicon, that the technique holds littl
15、e promise. The reason for this pattern is understandable and historical. Crystalline silicon is the active element in the very successful semiconductor industry, and virtually all of the solid state devices contain silicon transistors and diodes. Crystalline silicon, however, is particularly unsuita
16、ble to terrestrial solar cells. Crystalline silicon solar cells work well and are successfully used in the space program, where cost is not an issue. While single-crystal silicon had been proven in extraterrestrial use with efficiencies as high as 18 percent, and other more expensive and scarce mate
17、rials such as gallium arsenide can have even higher efficiencies, costs must be reduced by a factor of more than 100 to make them practical for commercial use. Besides the fact that the starting crystalline silicon is expensive, 95 percent of it is wasted and does not appear in the final device. Rec
18、ently, there have been some imaginative attempts to make polycrystalline and ribbon silicon, which are lower in cost than high-quality single-crystals; but to date the efficiencies of these apparently lower-cost arrays have been unacceptably small. Moreover, these materials are cheaper only because
19、of the introduction of disordering in crystalline semiconductors, and disorder degrades the efficiencies of crystalline solar cells. This dilemma can be avoided by preparing completely disordered or amorphous materials. Amorphous materials have disordered atomic structure as compared to crystalline
20、materials; that is, they have only short-range order rather than the long-range periodicity of crystals. The advantages of amorphous solar ceils are impressive. Whereas crystals can be grown as wafers about four inches in diameter, amorphous materials can be grown over large areas in a single proces
21、s, whereas crystalline silicon must be made 200 micron of the proper amorphous materials in necessary. Crystalline silicon solar cells cost in excess of $ 100 per square foot, but amorphous films can be created at a cost of about 50 cents per square foot. Although many scientists were aware of the v
22、ery low cost of amorphous solar cells, they felt that they could never be manufactured with the efficiencies necessary to contribute significantly to the demand for electric power. This was based on a misconception about the feature which determines efficiency. For example, it is not the conductivit
23、y of the material in the dark which is relevant, but only the photo-conductivity, that is, the conductivity in the presence of sunlight. Already, solar cells with efficiencies well above 6 percent have been developed using amorphous materials, and further research will doubtlessly find even less cos
24、tly amorphous materials with higher efficiencies. (499) 18 The author is primarily concerned with _. ( A) discussing the importance of solar energy ( B) presenting a history of research on energy sources ( C) describing a possible solution to the problem of the cost of photo-voltaic cells ( D) advoc
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- 外语类 试卷 专业 英语 模拟 506 答案 解析 DOC
